High pressure sodium vapor lamp having unsaturated vapor pressur

Details High pressure sodium vapor lamp having unsaturated vapor pressur High pressure sodium vapor lamp having unsaturated vapor pressur

1987-03-16

1988-07-05

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313571, 313642, H01J 6120

Patent

active

047557214

ABSTRACT:
This invention discloses a high pressure sodium vapor lamp having unsaturated vapor pressure type characteristics with sodium and mercury contained in an arc tube. The sodium is enclosed in an amount sufficient to exhibit unsaturated vapor pressure type characteristics while the mercury is enclosed in an amount M.sub.Hg calculated by the following formula: ##EQU1## where M.sub.Hg : the amount of mercury enclosed (mg)

REFERENCES:
patent: 3453477 (1969-07-01), Hanneman
patent: 4075530 (1978-02-01), Furukubo et al.
IEEE Proceedings, vol. 128, No. 6, Sep. 1981, pp. 415-441, Old Woking, Surrey, Great Britain, Van Vliet et al.: "High Pressure Sodium Discharge Lamps".

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